I don't normally post, cos I'm a bloke, I'm only on here to try and understand joint custody from a mum's perspective. But I think I can help with this one.
Probs with men is we want "good" quality things and "the right one" which is obvs a nightmare cos so subjective.
The comment about better versions of stuff we already have is on the money. I've listed some stuff below that I don't think anyone could argue with - all pretty incontrovertibly "good". [prices in brackets]
it being Black Friday I'd defo agree with wireless headphones (brands ATG, Bose, Sony, genuine apple airpods - suggest you go "over ear" if you don't know what he wants)
[probs don't spend less than £50 and £100ish will get great quality]
Google home
[the mini is only 30 quid and the new one with the screen down to 100.]
If they have home / Alexa then compatible things (Phillips hue bulbs?)
[Probs starts at £30]
If they drink whisky don't be intimidated by not knowing much about it. The price reflects the quality so you can't go far wrong - you'll get what you pay for, just make sure it's single malt (unless you know they drink bourbon). If they only like whisky a bit, or don't know it very well, then a balvenie doublewood is about £35-40 and everyone likes it (quite sweet and very drinkable). There's a lovely laphroaig select on amazon down to £21.25 on Black Friday.
Clothes wise I'd say something really good quality will always go down well.
Something like the Farah Rosecroft lambswool jumpers [again on BF sale from £30-50].
Every man should have some great tapered leg jeans. Dry denim, 12.5 or 14 oz (really stiff when you hold them / first wear them). Nudies for slimmer gents, Edwins for a fuller figure (like me).
[expect to pay around £100 and he might have to take them back to tweak the size / leg length so maybe don't buy online?]
A man should have good luggage (I don't so it's on my list). MandM have some very affordable Ben Sherman, farah and Lylle and Scott holdalls at around £25-30. we do a secret Santa for £100 and I'm going to ask for a Barbour holdall that's £105.
Beard products if he has one. Especially if he doesn't use anything. Nice brush, balm and / or oil. [brush about £20, balm and oil about £10 each]