I'm selling those two games for Game Boy Advance/SP/Micro or DS/DS Lite (the Sonic Combo Pack cartridge includes both Sonic Advance and Sonic Pinball Party). They're in perfect, mint condition (except for the Mario Golf box, which has a few small creases but nothing major) and include every original material except the shrink wrap =) Just have a look...you can click the thumbnails below:
$15 for Mario Golf Advance Tour
$10 for Sonic Combo Pack
Or both for $20