Vintage Tonka collection

I recently came into a Tonka truck collection after my father-in-law passed away and would like to get an estimate of its worth. I have the following trucks: 

- Complete 1950s-era orange Hi-way construction set with signs (no boxes)

- Limited edition reproductions from the DeSalle collection from th 1990s including two Morell Meats trucks, Ace hardware box truck, Harley Davidson box truck, Hi-way lowboy and an attachment for the Bruce floor wax truck - all are signed by Don DeSalle and stamped 002 with COA except Harley box truck

- 1950s-era red, pick-up truck

- 1950s-era school bus that says Cor-Cor  on the side (sp?) 

-Holsum bakery truck (poor condition) 

We are looking to get a value for the collection as a whole and by individual pieces