generally a seller's feedback is a good indication of whether the products they are selling are genuine or not. the seller of the auction you're interested in has excellent feedback, i wouldn't have any worries about these particular tickets.

also, pay attention to where the seller posts the tickets to, they may not send it to your country. what i do in these situations is contact the seller and ask if they would consider posting the item to my country. some will, some won't.

i'd suggest you watch the auctions you're interested in closely till the very last seconds. an increasing number of people only bid in the last 20 seconds or so. i've recently lost an auction in the last 5 seconds

i'd be very shocked if this was the final price for both tickets. you can never predict what the final price will be. many times the sellers set a starting bid at €/£/$0.99 to attract more buyers.