RF Generation Message Board

My friend a few weeks ago got a broken Supervision Hand held at the flea market for 7.00.  I was interested ( trying to figure out what it was ) and didnt move fast enough and he knew what it was and jumped on it.  Never to get it working. Opened it up and said one of the capacitors looked blown. I wanted to try to get my hands on it and look at it and try to fix it.

Traded him a working Sears Super Arcade Video ( INTV) 20.00 cash and a copy of Fantasy Zone for it.  I got it home used a qtip to clean the AC port and the battery connections ( they looked clean but figured a once over wouldnt hurt anything. ). Sure enough works fine now.

Im thinking yes we both knew it was dead when he got it and traded it to me for the working stuff I had ( should be a closed deal and move on ) , but Im thinking what I can throw in now to help make this a little more even 20.00 worth or stuff would be close to an even deal. Hes a good friend and fellow gamer. I want to make good on the luck that I did get it working. he got about 70$ in stuff and cash for it broken but I feel he should get something extra for it. I could be wrong but some reason I feel like I should.

One of these? http://www.ebay.co.uk/itm/171331890083?orig_cvip=true