My wife wanted to buy a concertina. She contacted Hobgoblin's at Crawley. They put a £1300 Wheatstone in the post for her to try out. She was able to play it on a gig and give it a good try out with the rest of the band.
No problems at all and great service.
I've also been to Manson's at Exeter. A superb guitar shop, good range and a good room to try them out.
My son went to them to buy a solid elctric guitar. He was able to play it as long as he liked.They also made sure that he had the same model amp and effects box to try it with that he would be using at home.
Manson's is more than a 200 mile round trip for us but worth every mile!
JH