[JonM]

when you have an item that has relatively little demand with very few people wanting it, the prices tend to be higher to recoup machining costs, importation fees etc. the reason ar15 mags are cheap is there are literally millions of the rifles. very wide base of folks wanting them so the costs can be spread out.

so its not surprising the 10 rounders cost that much. while magazines are generally simple devices they arent cheap to tool up to produce