I think £700 is a good price for a lefty mk4. The EV should compe4e with all the other top guns if you can drive it. Top three places in AA GP series taken by people shooting EVs (they can drive theirs
My EV is as accurate as my Pro Target - both can match my Walther any day of the week.
My Walther cost me around £1400, the EV £750 but the Pro Target was only £400 - such a bargain for what you get.
The main problem with EVs is the quality control when new. Try before you buy - for as long as possible