What's it worth...

[M450N]

Got an ironmen DM6 looking at selling
The anno is mint, comes with o-ring monkey spares kit (5 rebuilds)
Has small leak from the on/off under the barrel

So what's it worth? How much should I be putting it or sale at?
Thanks

 

[jfp]

Hard to say... As it's an old marker, normally see them sold for anywhere between £60-£100 as a guide price