I've learned about this vector analyser recently and its price and specs makes it really attractive for Ham Radio !

It is a vector network analyser from 50kHz-300MHz but via software upgrades can be expanded up to 900MHz.
So great for the HF bands, 2m and 70cm ham bands.

It's a 2 port analyser so you can use it for both antenna's and filters

And now the price... less than 50 Euro's !!

You can find all technical information about in here:

It's for sale on several asian websites so pick your prefered one