Got mine on one of the buy/sell groups on Facebook,one complete builder and one damaged junk body + hidden headlight grill for $50. I`m doing a conversion with the junk body,using the later AMT 67. For a mint complete kit expect to empty your pockets. As for my part i mostly hoard parts,and in the end i usually end up with complete kits lol. Point is,if you want one priced at non crazy amounts there are other arenas to search then Ebay. One is in progress so looks awful on the pic.
There is a mint sealed now for $75. if paid $45 for mine,and i have another built in good condition. I would not pay more then $50-60 for a mint sealed one. These kits arent very rare and pop up all the time. If you pay $100 you either have to much money or just got to have the 1970,if you pay $160 your brain must be asleep.