Timing Chain on Mini R55 Clubman One D

[MyMini]

Oh dear... 

Driving at 70mph-ish, an almighty bang and the engine died. AA suspected the timing chain had snapped, and have been quoted £1,600 for a replacement, before knowing if there is any engine damage (!).. This seemed a lot to me, but seems the engine and gearbox have to come out to replace the chain, and I'm not a mechanic and we trust our garage sooo.... Am I being daft or should I go elsewhere? Would mean towing so there'd be a cost involved there, of course.

It's a 61 plate, 110000 miles, valuation at Parkers not much over £2k, so have decided it's not repairable. Question is - can we sell it as spares/repairs, and what would we ask? Scrap price as a non-runner we've been offered £297.

Pretty sure the tensioner was checked at the last service (carried out by Mini), though of course that doesn't mean anything!

[X5smw]

In all honesty, you can pick up another mini for that price. 
I would look for another and then eBay the old one with a reserve of its scrap value or search for another engine. Depends on how much the labour costs are?