You're welcome - please do PM or bump the thread if you want any further help. I'll admit to being a bit evangelical on this topic - I've seen too many parents spend gut-churning amounts of money on the wrong thing, and too many students putting on a brave face to spare their parents' feelings while struggling with a guitar that may be good but isn't right for them.
When she goes to try this guitar, make sure that she does the following:
- Tunes it accurately;
- Tests every single fret on every string for buzz or deadness (and don't buy it if any frets are more than slightly buzzy or don't make a sound);
- Checks the fingerboard and all sides of the body for any splits (grained texture is normal, deep grooves or splits are not);
- Holds the guitar level with her eyes, and looks down the neck (from the bridge end, towards the headstock) to look for any twisting of the neck (if there is anything other than a slight angling-back of the neck at the headstock end then don't buy it);
- Feels the tuning pegs to see if they're sturdy (if not then don't buy it or it'll go out of tune on stage);
- Gives the guitar a damn good strum to check how well it holds its tuning (it may go out of tune if the strings are very old or new, but shouldn't otherwise);
- Gives it a shake to check for any rattling inside (if yes, investigate);
- Checks the electrics if there are any - bring an amp for this;
- Plays if for long enough to be 100% sure whether it's comfortable for her, thinking about the neck shape and the body shape, and whether she likes the sound.
Both of you, remember - this is just one of many second-hand guitars available, and you won't be "missing out" if it's not the right one for her. You're only saving money if she sticks with this guitar until she's ready to buy her "forever guitar" - otherwise, you may as well mentally add £150 to the price of whichever guitar she upgrades to in between. If you wait long enough and keep saving, she'll find a good second-hand Taylor GS Mini or another great guitar going for not much more than you're prepared to pay for this one.
Lots of guitar shops do second-hand instruments for reasonable money. Gumtree, ebay, preloved, and the ad sections in the back of Total Guitar, Guitarist Magazine etc are all great places to find intermediate-level instruments that people are selling in order to upgrade to something more expensive. In every case, putting in the time to find the right one (where possible negotiating on the price), can make a huge difference to how far the instrument will take her.
Regarding amps - which one does she have? Some "electric amps" are fine for acoustics, others are not so much. It's not necessarily an issue for bedroom practice (although a good amp makes it a lot more fun), but it's definitely something to consider when playing live or jamming with other musicians and at open mic nights etc. I recommended the MicroCube because it's very sturdy, mimics lots of different types of amps and effects (which is super-fun), is equally good for semi-acoustic and distorted electric guitar playing (which may serve her well in the future) and is always handy as a super-portable practice/jamming amp. None of my students ever "outgrew" theirs, and neither have I.
In her position, I'd rather have a borrowed guitar for a year or two and a kick-ass practice amp, than an unsuitable guitar and a limiting amp. It's also better for your budget - I got mine for about £70 a few years ago, and loads of my students bought them for similar amounts of money.