
Back in 2004 I paid £170 at my own vet for Hip scoring. At a specialist in Hereford I paid £125.25 in January 2010, both prices include BVA charge.
A friend wants to get her 3 year old bitch scored and as mien is 15 months we are going to combine our visits and are getting them done on the 10th of May so will be able to update current charges at this vets in Kington.
It is preferable to use an Orthopaedic specialist to get good quality x-rays.
I have found the scores I get since using the specialist a couple of points better than previously (even though the scores I had before were average, I had found other people's litter-mates scoring better when expert vets used).
As for age at scoring good hips will hold up with age, but poor ones will deteriorate.
Two litter-mates I bred were scored at just over a year and at 4+ years and both came back with almost identical scores (in the details), with just one aspect on one hip a point higher.
There are a number of Vet practises and human radiologists that do a lot of hip x-rays and get good even plates, and at more reasonable cost than the average city vet.