Not much, based on MyComicShop & Ebay it seems most issues list for about $5, I'd probably go half that, they'd be graded & bagged. Some are worth more, they must have dungeons in them or something, I'll have to scope that out. I'm thinking I'll list the scattered issues for sure, I may try an auction of the 77 issue run, set a minumum bid of $149 & see if I get any bites.
By the way, I didn't collect Dragon magazine but I loved D&D as a kid, I enjoyed just reading through the dungeons. To this day I still like those kinds of games, in fact I just picked up the Dragon Age double-pack for the 360.

*ALSO*
top rated plus with all 5.0's as ideaman33