I probably have 75 - 100 purchased VHS movies from the old days before DVD.
Given that VHS picture quality sucks compared to DVDs and that backing up a VHS to DVD will degrade the picture quality even further, what you would end up with would be much worse quality than copying the same movies from Satelite to DVD the next time they roll around on one of our comercial-free movie channels (HBO, Max, TCM, IFC, etc.).
Any flaw with my assumptions or logic?
The only downside I see is the extra space the bulky VHSs take up over the year or more it will take to catch all of the movies on satellite.