If I was buying from you,

I would ask to de-couple the sale of the machine.

I only want your location.

You may pull your machines, sell them separately.

I drop my machines in.

For me, the real cash flow is based on Money-in-the-room less the depreciation, less wear & tear maintenance costs, travel costs.

So, say $800 per month (pre-taxes)

Using 8% interest rate, the present value of the $800 a month over 5 years is $39,454.74

But, it is much easier to leave my money in the stock market, then do the work of operating a route, plus all the risk over 5 years
(location goes bankrupt, machines are damaged, playfield glass is broken, game is stolen, cost of insurance, building fire, node board failures, ...)

My offer, based on a one-year payback would be $9,600 for the location only.

Good luck with the sale.