AIBU to ask 'how much are you looking to spend?' Or similar when I'm asked what gift to get ds?

[anotherq]

Imagine this
You speak to your son on the phone every day (usually dad)
It's your grandsons first birthday in 6 weeks.

Every couple of days the same conversation happens. Word for word, exactly the same

You ask your son 'what should we buy DGS for his birthday?'
Your son replies 'I'll ask anotherq what she thinks'

He then asks his partner and she replies (every time) 'how much are they looking to spend?'
He says 'I don't know. I think they'll be happy with about £100'
His partner replies 'ask them how much they'd like to spend and I will forward things I've put in a wish list'
Again, this is also WORD FOR WORD the exact same every time

For context, partner has been thinking, planning and browsing since March. She has narrowed down a list of three big (£70-£100) things and small and medium (from £20-£50) gifts
Partner doesn't want to assume grandparents want to spend £100 on a gift.
The son is guessing this amount from the top of his head
Partner says 'What if they do want to spent £100 but only want to buy a £50 gift? Or two? Or what if they want to spend £70 and want it split over a few items?' Who knows? (unless you ask...)

So now it's been two phone calls since they last asked and it's going to come up again soon
The son says partner should send a few things to his mum of different prices
The partner says, once again 'just ask your parents how much they would like to spend'

So, my question is, is there something wrong with your son saying 'how much would you like to spend?' In this situation? Would you be offended? I don't know if I am not understanding something here.
Happy to be told I am unreasonable and open to other phrasing suggestions please

I’ve never had this dilemma but, thinking about it, I actually don’t think I’d be offended if someone asked me what I was thinking of spending.

I don't think I would be offended if asked but equally I wouldn't ask someone who didn't volunteer that information. We have created an Amazon wish list for DD that has items from a couple of quid to £50 on it and will be forwarding that to relatives and anyone else who asks. We have very limited space so want to make sure she gets things we have room for/will use.

Can’t you just say oh he’d love something to do with dinosaurs/a hat/a bath toy and leave them to it?

My parents wouldn't answer. They want to know what you want. Budget for them is almost immaterial. If there's something expensive you'd love they'll get that, if you only want something smaller this year, that's what they'll get.

I agree with "he's into: Night Garden / Paw Patrol/ Fireman Sam" and leave them to choose something from there.

Suggest something very small in the £10-20 mark and say if they want to spend more please buy child some premium bonds.
hold party in a neutral space for just a couple of hours, just don’t stress about. Child will be oblivious until the age of three (my youngest has just had her second birthday and liked the presents but didn’t really understand ). Birthdays are much more fun when from 4 onwards.

I've had this situation on in laws side. What I do I is send various items in various prices which wld suit a small or large budget. Often they say they'll get them all so it's pretty clear to me that in future I cld suggest something more expensive but again less likely to as I feel it's a bit cheeky to suggest something at £100. I think they prefer to buy a few gifts anyway.

Yes that's another factor that some people like to buy a couple of presents- my sister is like that, she would much rather spend £100 on 3 gifts than £100 on 1 gift.

I hope your DS has great birthday party.