You don't need 256 MB of memory... and you don't need 8X AGP. Both are marketing scams. That card is not fast enough to benefit from either of those features. By the time video cards need to have 256 MB of memory, the card will be so slow it won't be worth trying to run a memory hog of a game on. And to give you an idea of how useful 8X AGP is... I installed my FX5900 and forgot to enable 8X AGP in the BIOS... I already ran 3DMark... so I enabled 8X, ran 3DMark again, and the score increased by 100. So... even on a high end card, 8X AGP isn't THAT big a deal... and DEFINATELY isn't needed on a Ti4200.
Is there a reason you don't want to buy the card online? You'll get much better prices online... even with shipping charges.