Ouch.. way more than I would put into one. I would take a chance at normal retail though, not $100 or more over msrp.$288
Since it was for export to Europe, I couldn't rule out that they made an extra wimpy version just for European use.They do.
Look at page 12 of Ruger's SP101 manual.
Instruction Manual for Ruger SP101 Double Action Revolver
I just noticed that you can pay $459.99 for them from Preppers, who are also now offering them, and without the free shipping deal that Centerfire is offering (with shipping they are $479.98 from Preppers).Thats not really a bad price for them either. Especially if you look at what they cost new.