They did... I recently found a receipt for mine. £565 from some computershop in Leeds (First Computers?).
I went there (long way from Preston) to buy a HD8+ but they were out of stock (even though I had phoned up that morning and reserved one) and I was wooed into buying it by this slick salesman and the promis of £150 back if I sent in my old A500.
It was the biggest mistake of my Adult purchasing life. I was so embarrassed at what the sales guy had talked me into it affected me for years to come. Even now I scrutinise any purchase over £100.
I couldn't believe it. £415 for what amounted to a second disk drive and a monitor stand!
AND I had to buy a kickstart switcher the next week because it was KS2.04 and half my disks didn't work