They are so expensive even older analogue models in ebay going for £100s of pounds. I’m not a big fan of USB oscilloscopes. I haven’t seen a good review about them even they are not cheap.
I need one for my home project but dont want a spend that much
If you’re interested in electronics take a look at Circuit Cellar (electronic subscription is cheap – $15) – http://www.circuitcellar.com/ . It’s a lot of fun … 🙂