Neither do I. I suspect it's a bit of all the factors. Too slow build times, not enough innovation that focuses on reducing build time without reducing build time by paying professionals to do it. I think the remark on single-seaters is dead on. I generally am a firm believer in capitalism and especially where it concerns prices of 2nd hand airframes. There's good reasons an RV8 sells for more than say a C310 with a few hundred hours left on it's engines. Single-seaters have notoriously low resale values and I think that reflects the actual value prospective buyers put on them. If a nice flying plane like a Hummel bird sells for 8K or 10K, why on earth would someone be interested in a kit that wouldn't be significantly cheaper. The disparity between poll results and airframes on the market mostly. It might be that we're a small group of statistical outliers (not entirely unplausible ), but in that case, those voting should have run into a plane that fits their poll results. It might also be that those voting really want a 2-seater in which case the market is a lot sparser in this category. Personally (opinion, not data), I suspect that's the major cause.