Not too long ago, I bought these from a member on these boards-
Dragon Slayer Complete with Map $35
Dracula X Complete $75
Along with a few other games. He discounted the total and included shipping. His ad specified that he was looking to do package deals, so the base individual prices took that into consideration.
I also picked up this lot which included a complete TG-16, Turbo-CD set (minus the CD-ROM), Parasol Stars complete, plus several other games for $70 shipped express. On eBay the Turbo-CD case alone would ask a price like that. It's also basically DragonmasterDan's high end Parasol Stars price + the cost to ship the lot.
Even with a disclaimer like "what to expect on eBay", full price lists are still only going to inflate asking prices.