Dranddad:
it's your money of course, but you're having your leg lifted at that price!
When in 2013 I bought my B&M2 for my 2012 Qubo there were plenty of sellers asking £300-- but there were also plenty, including main dealers like Sturgess , selling them for £199.99, new with free p&p. That's what I bought. I'd try Sturgess (advertise on here in traders section) and see what they can do for you (Neil is usually very good on prices).
My B&M 2 packed in after a couple of years. In that time I'd forked out extra cost for updated mapping, extra for speed cameras, and my LIVE services had expired, but to renew was eye-wateringly expensive.
As for your "trouble free", have you read the tales of woe on here re B&M updates? Once you "get it", it's easy enough- but most have been thru hell before getting to that point of nirvana where they just breeze thru the latest update!
Buy a B&M2 and you're buying (a) an old design, small size 4.3" unit (TomTom 1000) just gussied up a bit for FIAT group vehicles (b) a unit that will cost the earth to keep updating and (3) an out of date operating system in B&M, FIAT have dumped B&M in favour of Udate or whatever it's called now (OK, I know it's called Uconnect!)
I replaced my B&M2 with a Start50. I got it brand new,free post, for £60, with full Europe mapping,free mapping updates for life; it has no LIVE but I rarely used it anyway, speed cameras availablealso with cheaper offers.I never used the ecodrive on the B&M2 satnav, as if you do, you can't see the GPS- stupid or what? The Start is bigger, I hate the mount but hey-ho, can't have everything, and I don't actually MISS any of the B&M connectivity....
It's naturally up to you, but that's my personal experience fwiw