Do you carry small, inexpensive electric saw with round blade.

Well, it depends on what you call inexpensive. But what I've seen their yes they do have inexpensive circular saws.

There's a website and coupons. If your item is not on sale there are usually 20%off coupons.you can also put saw blades on the angle grinder. D, ,

Yes

I bought one last week

That would be like a skill saw yes they normally run around $24