Looks like you have a Ludwig double tom mount on the bass drum (the double tom floor stand is also Ludwig). One question is whether that was installed as original equipment (perhaps by someone who didn't like the Memri-Loc stuff and ordered "virgin" drums and then installed the Ludwig parts) or did they remove the memri-loc parts and replace them with the Ludwigs. If the latter there'd be the dreaded extra holes but either way that's a bit of a hit on value as people generally prefer that stuff have the "correct" hardware. That and the concert toms, plus the somewhat bland white finish (both of which were, however, very popular at the time these were new) would also tend to reduce the value. I really don't have enough market experience on 70's Rogers drums to offer up a price. The cymbals could hold some value as well depending on what they are.
This would make a great set of functional vintage American made drums for someone if they were okay with the single headed concert toms but I'll leave it to others to offer up pricing estimates.