Getting two rings resized

[sapphicy]

I am looking to get two rings I’ve just inherited sized down so I can wear them, they fit my middle right finger but I want them moving onto my right ring finger, so about one size down I think.

One is antique 18ct gold band, the other is 9ct gold. The stones are all set on the top of the band, no stones on the actual bands if that makes sense.

Can anyone tell me roughly how much I should expect to pay?

I was quoted £100 to size down a ring, but it wasn't an antique, just a solitaire in 9ct gold plain band. That included cutting the ring, soldering and replating it so the join wouldn't show.

I paid £90 a couple of weeks ago to have a gold ring resized

£120 to size up and piece put in as it needed to go up 4 sizes.
This was last month