Squier CV Basses are every bit as good as the guitars. I have a CVC and a CV Jazz Bass and both are very nice instruments. In fact the basses just might be the all stars of the entire CV line. You can get closed to $300 ($322) on a new one if you wait until GC or MF offers one of their frequent 15% discounts. Used you would probably be looking at around $250 or so median price. I got by CV Jazz last fall for $250 used with a case. He could use a Cube guitar amp with the bass as long as he keeps the volume down but guitar amps are not really voiced for a bass nor do they have bass speakers in them. Roland makes Cube Bass Amps and I would suggest going that way if he wants a Roland. You might look at the GK MB Combo amps as a slightly lower cost alternative but in either case he'd be getting a first class small combo amp with great sound. I own a CV Jazz Bass and a GK MB112 Combo and I've played through Cube Bass Amps before as well. Good stuff very reasonably priced. Look used if you can find. They're dependable enough to trust.