the sites i prefer to sell (below that, it isn't worth it to me) charge $24.95 and $19.95. i haven't seen much difference between those two prices - neither in initial sales nor in rebills. that being said, i sell one site higher very successfully, but they are a pretty unique niche.

i don't think what was spent on the site ever has anything to do with the price. it's just what the owners think they can get. i've seen sites that were virtually all plugins (which means no big expenses to set the site up) that rebills at $39.95 and sites with 100% exclusively shot u.s. content rebilling at $9.95.