Last week a handyman chap we sometimes use for odd jobs etc came to fit a new stainless steel cooker hood as the motor had gone in the old one.
I bought the exact same model to make replacement easy (and so I wouldn't have to repaint
)
When I saw the finished job he'd replaced the triangular hood bit (with the motor in) but left the original stainless steel chimney bit as he said it was in good condition and made the job quicker. I said fine as it looked OK etc.
He left me the old cooker hood in the box from the new one and said 'that old one will need to go to the tip' and I said fine. (our council charges ££ for tradesman vans, so they prefer to leave stuff for householder to take in a car).
Thing is, I hate dumping stuff and prefer to offer on eBay or Freecycle as spares or repair, so today I got it out to photograph and found that the new chimney wasn't in the box, nor were the slide in filters for the
bottom of the hood. 
I texted him and asked him if he 'left them' somewhere (our garage is a bit of jumble).
Him: I’ll have a check, I might of put them in my shed when I cleared out my car at the weekend!
Me: I'd like to put the whole thing on ebay/Freecycle
Him: I never throw any thing away - if and when I find them I let you know and drop them back.
Me: Well I would like them back. Please check and let me know.
HIm: I think I just said I would drop them back. They are no use to me and I just cleared them as I was tidying up. I just got home and will look in my shed tomorrow morning.
Me: Great, thanks.
AIBU to think he nicked them to sell on etc thinking I wouldn't notice, but now realises he's been rumbled?
Seems he went quite quickly from "I might have them" to "I just cleared them up" (if so, why not put them in the box with the rest of the old hood?)