How much $ for a Demon

I gave $400.00 for my duster , the body was in fair shape some rust not to bad . it had a 6 in it . that ran great . she now has a 340 in her 727 trans 8 in race 5000 stall dana 60 4.56 gears on spool . that just some of the stuff i hav got in it. and still not done with it. i have done a lot of work to it two new front floor pan an two new 1/4 panel . did not like thhe way the old ones look . some one had put to much body filler on them. it 's not a show car by a long shot. just my car. bulided for go not show. so i will kept her for some time with the prices of the A bodys going up .