The RSOC valuations seem to be a little 'off' anyway if you ask me. I've seen numerous 500's for sale 'RSOC valued at 25k' and 'RSOC valued at 20k' etc, but always for sale at 15-17k for the mintiest of minters.
Remember Steve's (Steve and Liam username??) absolutely fantastic RS500 in every way, RSOC valued at something silly like 25k yet it was for sale at 18k and no one bought it when he wanted a white one.( - All if my memory serves me right.)
So it's actual value seems to be the RSOC 'dodgy trying to keep the market up' value minus 5-10k
The only thing their valuations are good for are insurance scams