The balls in your court now for how you want to proceed, I would'nt say this is any type of scam, But would agree he's inexperienced, otherwise he would have put more pics up and glamed it up more in the description. I would say he's gutted he did'nt put a higher starting price, And it seems he did'nt put a reserve on.... so maybe!!! he's trying to put you off... With the said incident, Thinking he can easily relist in a week or so with a higher start, Not mentioning anything in the new ad about cooling issue? If any!
However he may be telling the truth, In which case, Either way the item that you decided to bid on, Doesn't fit the descrition anymore, and you must ask yourself would you have bid if cooling trouble was mentioned,
Maybe some more experienced RIB valuation members than myself will be along soon and give you an idea of the value should be.
Just a thought of course.