TC or SC?
I got a 2.2SC engine off ebay for £25 and paid the seller another £25 for the gearbox. I'd been half tempted when the engine was listed with a starting price of £50 and had no bidders, then it was relisted with Buy-it-now of £25 so I jumped straight in. It came complete with ancilliaries - starter, carb, alternator, etc.
What I'm trying to say is SC engines aren't worth much at all. He'll probably get more by selling the ancilliaries on eBay separately.
TC engines are likely to be more sought after, but again the carbs might sell for more than the entire engine.
And if it is a TC and has a decent exhaust downpipe - we're all after those!