VS1 or VS2.
Maybe something a little bit better and older secondhand.
There are a lot of 'low end' guns for around £100 or less,
Icon LED for instance (****tiest gun ever!) or some of the lower end spyders.
The only thing I'll say is that at that price point for a slightly older "premium" marker , you'll have to look after them more than you would with an ion ( although they are easy to strip as I've found out )