I have a BR 400 I got 6 or so seasons ago and it is running fine...no problems what so ever. I got the kombi blower as a backup a month ago just in case. My question is a guy I work with is interested in buying my BR 400 and I would love to have the BR 600. Is it worth it to trade up and what is a fair price for my BR 400? I was thinking 250.00 - 275.00 for my BR 400 and then looking for a decent deal on the BR 600. I do like to trade equipment every 5-7 years just for reliability purposes...stinks to have a breakdown while doing a job. Any advice is appreciated.