[North Coast Cab]

My son has been taking lessons for 6-mnths or so. Practicing sporatically, but interested. He currently has a very low-end amp that came in the set-up with the beginner guitar. So, he's driving me crazy for a better amp.
Can you guitar guys give me some guidance? What brands, wattage, amperage.....is used an option? There are a million on eBay.

Thanks