Someone wants to take me to small claims court

eBay rules are irrelevant as sold outside. Plus it's an 800 pound car FFS! The buyer could have HPIed the car but failed to bother. Plus a write-off on an old car could be just a cracked bumper. Tell them to do their worst, it'll come to nothing.

If it's fit for an MOT, then it's perfectly roadworthy.
As for any supposed damage, you can prove you didn't know about it, and have no proof of her story.
I say stuff em

He doesn't have a leg to stand on as the deal was done outside of ebay

You could just offer a refund and see what he says.

I wouldn't worry about it. Whatever happens, he can't expect you to give him half of the value of the car back!

Out of interest, what car was it?

Sod him! I wouldn't mention what make of car it was on here, JUST in case he finds this thead through some unlucky chance.
If you gave him a sold as seen receipt (as I always do) he has no chance.
I sold a Golf VR6 a few years ago. The car wass ropey. The lad came to look at it, and bought it in the dark. He then got very threatening about 2 days later saying the engine was knackered and he wanted about a grand towards a rebuild. I told him I sold it in good faith, and that he was satisfied with the car when he bought it, hence was happy to sign his part of the receipt. Enough said.

I cant remember if I gave him a receipt or not? I normaly do 2, 1 for me and 1 for the buyer but I cant find my copy, Thinking about it I'm sure I didnt do one?

Btw, your response to him earlier was spot on. Ignore him

cheers guys, Wife is worring about it because she doesnt want us to get a CCJ,

He was 50 ish year old and looked a respectable/well spoken chap not the sort to try it on

I say stuff him and ignore any further communication.

I had a similar incident a few years ago when I sold my Opel Monza, the car was advertised as tidy(which it was) with a fresh MOT(which it had) the car drove well with no serious problems other than a rattly exhaust and a leaky fuel tank. The gent who bought it came some miles to pick it up, had a good look around it before parting with the cash and dissapearing with the car(drove home with no tax......tut tut). 2 weeks later i get a letter through the door demanding I pay for some "serious" rust repairs after the steering box apparently detached itself from the car, he enclosed a copy of a recipt for said work which had already been done and advised me to pay back the cost of the work or I would be taken to court.
Now, to say i was a little upset would be bit of an understatment as I knew the car was solid in all the right places, if it hadnt then i wouldnt have bought it in the first place! So i asked for photographic evidence of the problem area before i would even consider paying up..............another 2 weeks later i get a slightly more rude letter more or less telling me that no pics would be shown and that i MUST pay up, with that i went to citizens advice about the matter and they told me that due to the nature of ebay that the buyer didnt have a leg to stand on and that any claim made would most probably come to nothing and only cost them more money!

If i hadnt already spent the money i would have bought the car back to shut the idiot up and kept it as it was among very few straight&solid GSE Monza's left.....................oh well

Steve