What is a realistic multiple for sale of business?

I’ve been getting calls from local brokers lately claiming to have interested buyers - all of which are offering to pay in the 3-3.5 x net range. They claim there’s a rush of investors looking to buy small, “critical” businesses in my area.

I’m sure there is an element of sales pitch to the calls, I’m just wondering what valuations are being used currently and whey or not it’s even worth entertaining right now given the uncertainty of the industry in general.

Any and all input is greatly appreciated all. Thanks!