window rounds are notoriously a bit dodgy when it comes to buying and selling.
unfortunately there are people who will try and rip you off.i would never buy a round off these guys who have not got established rounds(5 years or more)and i certainly WOULDNT PART WITH ANY MONEY until ive knocked on all the houses on his customer list and introduced myself and/or worked the round with him.
i bought a very small round in 1993 off a guy i trusted and worked with(2 days work!!)then went canvassing like crazy for 6 months then recommendations and word of mouth as been my most consistent way of adding more customers over the years.
tread very carefully lads!!
dazmond