I'll put in my 2 cents worth: $300 for 8 hours is $37.50/hour, including the use of equipment and whatever supplies were consumed. I am assuming that the 8 hours is legit--i.e., that you kept after it, didn't have a lot of breaks or downtime or interruptions, etc. I am also assuming that the work was well done. In our area in south Piedmont NC, I would be happy to pay someone $300 for the full day's work you describe. The range of charges here is great. I think that I might have found someone to say they would do what you did for maybe $20/hour. I would not have been surprised at a quote of $60-70/hour with the equipment involved and the welding knowledge. Above that, I would have been surprised. So, if I were the buyer in this equation, I would be glad to pay the $300, especially in a barter. In fact, my only concern as the buyer would be to make sure that you were happy with your side of the deal. Our philosophy about doing business is that we want both sides to have a good outcome and be happy with the deal. Really good long-term relationships are much better in all respects than short-term bargains or short-term money grabs.