It not even worth pulling the cables out for $3! Give them two quotes, one to fix it right and one to half ass it. Explain to them that one will not come back and the other way you'll end up with more of their money! Most shops will only do it right the first(and charge for it) since it affects their reputation. Suggest a two things: 1) for new customers, charge half price for the first job. If it doesn't break they will be back with other stuff. 2) If they don't like your price send them to another welding shop! It's not worth the frustrations! Most people who try the cheap way usually end up remembering the piece of crap(new machine or repair work). People also remember how well something last and not the price they paid for it!