No I wouldn't – just curious. Such a 'hairline' crack….wierd place for it to occur without any stress anywhere else around the headtube or downtube?!!!

click on the pics..

http://cgi.ebay.co.uk/Commencal-meta-5-5-/180552407292?pt=UK_sportsleisure_cycling_bikeparts_SR#ht_500wt_1154

No! I would leave that alone as well

Crash damage?

and no, not even with your bargepole.

commencals are notorious for cracking and snapping. i'd never buy one 2nd hand..ever

the welding is not that good and it will have destroyed the heat treatment of the alloy

The owner was going to race the mountain of hell on this but the birth of his daughter changed this – think he means now that he's a dad,has a purpose and values his life more he wouldn't risk certain death by trying to ride this!

For a crack around the top tube there MUST be hairline cracks along the welds somewhere?!!