Hi Steve,
Speaking of sub £500 5 string basses that I would go for I've just taken delivery of a used first generation SBMM Ray35 in the natural ash finish. I've had "real" US 5 string Rays before so am able to make a reasonable comparison:these Ray35s are Stingrays through and through! I know these might not be your thing especially with the 17.5mm string spacing but I love the Stingray tone but not the £2k+ price tag on some of the EBMM Rays that preceded the 2018 Stingray Special range. As far as I'm concerned I have a Ray for less than 1/4 of the price of some used USA examples ☺️