How Much Does a MOC Cost? A Brick Part Budget Guide
"How much will this MOC actually cost me?" Every builder asks that question before starting. The honest answer: the spread can be ten times over. Take two builders with the same 3,000-piece model — one spends 3,000 RMB, the other spends 800. The difference is whether you know how to estimate part costs before you order anything.
Why Cost Estimation Matters
Skip the estimate and your budget runs away from you. The instructions look great, the part orders keep growing, and the model ends up unfinished in a storage bin. A proper estimate lets you decide before you start: is this model worth building, which parts do I buy first, which can wait, and which of several candidate instructions should I commit to.
The Formula: Count Pieces, Then Price Them
The most practical approach is a weighted calculation by part category. Sort parts into four price tiers:
- Basic bricks and plates (2x2, 2x4, 1x2 and so on): roughly 0.05–0.15 RMB per piece;
- Shaped parts (wedge bricks, curved bricks, slope bricks): roughly 0.15–0.4 RMB per piece;
- Special parts (hinges, wheels, printed parts, rare colours): roughly 0.5–2 RMB per piece;
- Electronics and motors (if the model is powered): 20–100 RMB per unit, budgeted separately.
First work out roughly what share of the parts list each category takes, then add up "total pieces × category share × unit price" across all four tiers. That gives you a cost estimate that lands close to reality. A worked example: a 2,000-piece Technic MOC with 60% basic parts, 25% shaped parts and 15% special parts comes out at 2000 × (0.6 × 0.1 + 0.25 × 0.25 + 0.15 × 1) ≈ 2000 × 0.265 ≈ 530 RMB. Add a 10% buffer and a budget of around 580 RMB is a safe place to sit.
Three Traps That Wreck Your Estimate
- Rare-colour parts: the same mould in grey costs more than in black, and unusual colours such as sand green or bright orange can run several times the price. Always price these separately instead of using the tier average.
- The sunk cost of your own stock: if you can dig parts out of bins you already own, don't count them again as cash spending — but do count the time you spend sorting and hunting for them.
- Shipping and minimum order quantities: buying a few dozen small parts from a loose-part marketplace can cost more in postage than the parts themselves. Batch small orders together or consolidate everything into one store.
Three Buying Tricks That Save Money
- Buy loose parts, not whole sets: unless special parts dominate the parts list, never buy a full set just to get one component.
- Substitute domestic parts: where colour match and tolerance aren't critical, domestic-made parts are perfectly fine for hidden internal structure, and they can save you 30%–50%.
- Order in batches: buy the structural parts you can't build without, start building, and top up the cosmetic parts as you go, so you don't stockpile the wrong thing in one go.
Static MOCs vs Technic MOCs
The weighting differs sharply by model type. Static display builds — architecture, animals, street scenes — are mostly basic bricks and shaped parts, so cost is driven by sheer volume. Technic MOCs — construction vehicles, supercars — lean heavily on special parts and motors, so cost is driven by part type. At the same 2,000 pieces, a display model might stop at 400 RMB while a Technic build often runs past 1,000 RMB. Identify the instructions' category before you estimate, or your budget will be wildly off.
Tools and Resources
Plenty of communities now offer downloadable parts lists, and paired with inventory management and price-comparison tools, a complete cost estimate takes only about ten minutes. BrickPlan's blog collects hands-on experience with part sourcing, loose-part channels and budget planning — worth a read before you start, so every yuan goes where it counts. Once you can estimate costs, no overpriced parts list will scare you off a build again.
FAQ
Q: Roughly how much does it cost to build a MOC? A: The spread can be ten times over — of two builders with the same 3,000-piece model, one spends 3,000 RMB and the other 800. Static display builds are mostly basic bricks, so cost is driven by volume; Technic builds carry a high share of special parts and motors, so cost is driven by part type.
Q: How do I actually calculate MOC part costs? A: Use a weighted calculation by category: basic bricks and plates run about 0.05–0.15 RMB per piece and shaped parts about 0.15–0.4 RMB per piece. Work out each tier's share of the parts list, then sum "total pieces × share × unit price."
Q: Which parts are most often underestimated? A: Rare-colour parts. The same brick mould in grey costs more than in black, and special colours like sand green or bright orange can cost several times more, so price them separately. The sunk cost of parts already in your own stock is another commonly missed factor.
Q: What buying tricks keep MOC costs down? A: Buy loose parts rather than whole sets — don't buy a full set for one component. Use domestic parts for internal structure where tolerance and colour don't matter. Stock common basic bricks by the kilogram, and buy rare parts individually.