More than one product in the same record ?

Hello,

I am selling comics on my website. Comics are graded in the following way;

NM - Near Mint
VF - Very Fine
F - Fine
VG - Very Good
G - Good
FA - Fair
P - Poor

For example I have two copies of Superman #285, graded VF and G respectively. Obviously they have different prices. The customer will be able to choose the one he/she desire, and once it's ordered that grade of comic should not be seen in the next searches. Or I should say the comic should be seen with the only available grade. The other grade/grades could be passive. Anybody could help me, please?

Thanks,

I would look at the stock-by-attributes module in the downloads area - then you would add attributes to your listings of the grade - you will have to see what the exact display turns out as