Recommendations to buy used monohull around 125K

[double u]

the size-bracket - "-42-50' ish" seems to suggest that you have to delve into the subject of costs somewhat deeper:
costs go up by approx. the 3rd power, so 50' cost ~1.68 times more than 42' (everything else being equal)

[boatsisboats]

Thanks Double U

This is exactly the reply the type of reply I love. Please tell me how you came to such a specific number (x 1.68) comparing a 42' to 50'. If the 2 boats are the same purchase price, how does the total cost rise to more than 2/3 more again?

[double u]

Now let's see:
"...costs go up by approx. the 3rd power..." add: of the length. For the same type of boat (!) displacement goes up with the third power of the length: so a boat twice as long will weigh abt 8 times as much & cost about 8 times as much (2³=8)
While this is an extremely rough formula, it is not sooo far out. Of course not when comparing a HR with a Bavaria or a Swan with a Hanse, or if comparing a 5 year old boat with a thirty year old one.
This means when you take a certain size-bracket into consideration while having a fixed budget & pretty close ideas of the age of the boat that you are looking for "42-50" is much too large a bracket, as the 50 footer will cost approx(!!!) 1,68 times as much as the 42 footer (50/42=1,19 and 1,19³=1,68), again comparing same style & age of boat. This pretty much applies to the purchase & the refit costs & is of course a VERY rough approximation.
What I want to lead up to: 40'-42' or "48-50" would be a sensible bracket, & if your first idea is "42-50" you should read up on prices & about the huge difference in upkeep & running costs between a 42 & a 50' boat.
Of course you will find 42'ers for the same price as 50'ers on the market, but they will hardly be the "same type" & "everything else the same" - boats.

[double u]

https://www.inautia.de/boot-27157050...505748459.html
https://www.inautia.de/boot-36481050...668554557.html

https://www.inautia.de/boot-45558080...849554566.html
https://www.inautia.de/boot-85200080...750505245.html

...of course "1,68" is an extremely theoretical figure, but a 50'er will just be "very much more expensive" than a 42'er (same age & type!)