Dragon's Forge has the bones of a great Ninjago set — six minifigs, a lava forge centerpiece, solid piece count — but LEGO® charged $80 for it in 2017 and the market remembers. A C is fair.
The parts alone are worth about 84% of the street price — the basis for this D price read.
FairParts are worth about 84% of the price — close to what the set is worth.
The forge itself is the highlight here: the lava-themed build has real visual drama, and six minifigs for a single set was a generous haul in 2017. The problem is the price never made sense at $80 — you were paying a premium for the Ninjago name more than the parts inside. Build experience is competent but not clever; don't expect any jaw-dropping techniques. On the shelf it reads as busy rather than refined, the kind of set that works better in a kid's hands than a collector's display. Value retention has been soft, so the secondary market isn't bailing anyone out either. Take it as what it is: a solid mid-tier Ninjago play set that hit above its weight in fun and below it in almost everything else.
This grade blends these community reviews with set facts and market pricing, and updates as new reviews come in.