The reason they close is because they are crap businesses and nobody with any sense wants to buy them.
Most of them are jobs, not businesses. The owner works full time in the business, doesn't pay himself a salary, and is left with a small dividend at the end of the year. In many cases, he's working for less than minimum wage.
But I've got
a list of marketplaces here if you're interested. Those are the places where businesses get advertised for sale.
I've got a lot of experience in this so trust me when I say - just DON'T! Buy a larger business, yes, not a micro business (under £1m in turnover)
There are several courses out there that claim to teach you how you can buy a larger business without any capital and without taking any risk. The sellers of those courses are, by and large, full of sh*t.
Get some more money together and buy a larger business when you've accummulated the capital. In the meanwhile, get a few good books on business buying. Or check out David C Barnett free videos on Youtube. Spend 100-200 hours on those videos before you even think about buying a business.