Way too much unless they are immaculate, Mike. I just won a lot of these on Heritage. With BP, the lot cost me $215. Note it included more than the Marvelmania but minus the coloring book.
Here is a link to the auction - http://comics.ha.com/c/item.zx?saleNo=121352&lotNo=14598
This is what was included in the lot I won:
Marvelmania Group (Marvel, 1970-76) Condition: Average FN/VF. Includes Marvelmania Monthly Magazine #1-5 (all have have minor to moderate foxing, would otherwise grade VF); Marvelmania Club Catalog #nn (three-punch holes along the spine, some minor writing in pen on the pages); Marvelmania Catalog #2 (some minor writing in pen on the pages); and Marvel Preview #4 (VG/FN). Not listed Overstreet.