Recommended purchase b4 avant 2.6 quattro

Hi together, I found this car: http://www.brauchtwagen.at/detailansicht.php?id_fahrzeug=842967 I already drove the engine in the a4 as quattro and in the c4 a6 as quattro and I like it. externally, however, I like the b4 better, especially as a kombi, moreover, I think that in winter the diff lock is useful (and also more fun is honestly the seller told me that he needs oil and the timing belt is probably due. my mechanic (vag vertragwerkstat) t) has told me that they make head seal, which like I have read at other places already with these models gladly makes problems, and timing belts for 1k €. how much would then be ok for the vehicle to lay down (the required 2k I certainly will not sheet)? to the cart: deutschland->österreich import. she is the 2nd owner in Austria. at the weekend I look at it personally, any tips what I can get as technically interested, but lay on it? am also for experience values on your part open. thank you in advance for your contributions