Its rare and interesting to see a two letter .co.uk domain/domain transaction.
I think you made a good buy at High £x,xxx
My thoughts, realistically, around £10,000 – £12,000 +
A great investment for the future.
Prestigious and desirable as a personal web/email address
Apart from personal initials/ initials, it doesn’t currently really mean anything, as far as I can see. This keeps the price/value down.
Of course sj.co.uk could become a business brand. Nice and brief.