I can use the following cards from your trade list:
1997 Ultra 3,16,18,19,71,207,240,302,303,314,319,328,329,333,337,338,345,349,356,366,368,369,370,371,374,376,379,381,394,403,405,408,449,451,455,459,462,463,468,469,470,471,473,475,476,478,479,481,482,485,486,487,488,489,490,491,492,494,495,497,498,499,502,503,505,507,508,511,514,522,527,529,534,535,537,538,541
If you want, I can send the Powell and let you take a look at it. You can then determine trade value and post up whatever you think is fair. I also have another 1971 Topps High Number if you are interested. It is #721. I can send it and the Powell if you want or just the Powell.
Just let me know.
Thanks,
Bryon