I just tried selling a load of coverdisks on eBay.
A job lot of 25 Amiga Format coverdisks went for £0.99
A job lot of 35 CU Amiga coverdisks went for £4.64.
A job lot of 9 Amiga Shopper & Amiga Power Magazine coverdisks went for £0.99
An Amiga Action coverdisk "Sensible World of Soccer SWOS Update Disk" went for £1.64.
A job lot of 30 Amiga Format Subscribers disks didn't even sell, the minimum bid was £0.99.
So I guess the answer to your question is: No!