Lowest I have seen for a Bison 3 Jaw is £525 GBP (shipping included), Lowest I have seen for a Bison 4 Jaw is £456 GBP (Shipping included), Which is why I was surprised that the Bison 5C is near on £1K.
Not above importing to get a chuck, up to a point based on duties ~(Read: Thieving government B£$%^&$"s), which is why I sprang for a 6 Jaw from L.M.S recently. Needed to hold some thinwall tube and my ER collets were with a friend that lives some miles away. Whilst they were recently on holiday (Vacation) I needed them, typical!.
Faster to import the 6 Jaw than wait until friend got back from holiday and the job got done. Still, cost me £275 GBP with import & carriage, but needs dictated my options at the time.