£70 is a reasonable for an eNMey (don't get a fenix) for that price range you may also find a PMR or an Ion which would both be a step up. Your choice widens again at the £100-150 price range with older DMs, Ego/Geo, Eteks and Ethas which again would all be a step up and last you a tad longer.
For £40 you will get a good hopper, some rotors and Z2s can be had for around that if you are lucky.
£30 should get you a nice aluminium HPA bottle too.