I have Mermaids of Atlantis, Baby Boomer, Qix, and Maxi 15 on your list. I had Bonk's Adventure but a while back I traded it in for Shantea. If everyone just collected the stuff they wanted to play instead of trying to get a "complete" set, there would be a lot more games to go around and the high prices would disappear. There's also a lot of rare Atari 2600 games that can be had for relatively cheap due to a lower collector pool and people aren't trying to get "complete" sets.
-------------------------
~From the Nintendo/Atari addict formerly known as StarDust4Ever...