Maybe the price helps to decide...
A few observations.... The trigger looks wrong, and the hammer shape is a bit off too. There's something odd about the frame shape too, at the top where it meets the breach. Not worth $140 in my opinion. It would need some serious re-working to be accurate. It can be done, but compare the webley ref picture and you'll not the differences.
I have to agree with the above, there is alot better out there and more accurate for that price.
Sidewinder, Stormrider, and Seven's "Budget Fett" kit are all a cut above that. Do a search or check the Blaster , shin tool, etc. forum. I think Stormy is gauging interest in kits as we speak for just a little more than that one.
And I have a Sidewinder myself and can vouch that they are awesome.