Allowing users to send a email of the RMA and also print it out to put it into a packing slip. Then being able to add a tracking number to the form and then receiving the rma like you do with parts orders. Not all rma parts are accepted for return profits)

As for Buy Backs, we when we install a part we then usually have a part that can be bought back by the same supplier or another supplier. These have a value for income return. If we have an option in each inventory item for a buy back vendor list and set cost would be great, Then we just click buy back in the invoice somewhere and it would process at ticket close.