Jeeez! I got my Type 200 for £12 a litre which was pretty decent and one of the reasons I bought itIt lasts 18 months though, so it's worth the investment.
I found myself bleeding the Motul 660 after each track day. Typ200 wasn't much different.
£48 the SRF can be had for. The Motul was about £30 for a litre.
I looked at some Endless RF650 which was £80 for a litre