wow, where I live the dogger pays more than that! Seriously, those legs terrify me, she's not a horse that's likely to be sound for a long time even in only very light work. She won't be a weight carrier (don't know what your friend wants but it is a consideration to be thought of).
Those sloped pasterns combined with her lovely shoulder will make a very smooth, comfortable ride, but smoothness should not be considered over soundness, EVER, and this one won't be a sound using horse, not for very long.
If your friend is only willing to spend $150 on the purchase of a young horse, a) are they REALLY experienced enough for a baby (or is it just, omg cheap horsey, I want her), and b) can they REALLY afford a(nother?) horse? $150 per horse is the base price my vet-dentist charges, not including travel and consult fee, and my two need their teeth done every 6 months... my filly because she's a baby, my gelding because he gets sharp points to his teeth really quickly. That's $300/year without even considering travel and consult which will add another $100/trip, PLUS feed, PLUS farrier (I do their farrier work but just imagine if I paid, that's $50/horse/month), PLUS drenching them for sand and worms... my yearly bill for keeping my horses is more than they are worth if I sold them and they aren't cheap horses like this one! If your friend won't spend more than $150 on a young horse, what else won't they spend much money on?
I had someone looking at a mare we had for sale a while back, and we didn't sell to them because "hubby will throw a fit if I spend more than $200"... we didn't think hubby would be willing to fork out $1000+ in vet bills for a MINOR injury (that is vet costs in my area, we had a very minor injury cost in excess of $300 for consult, antibiotics, and a skin flap cut off... if it needs stitches, and you live where I do, it's a miracle if it's less than $1000, and that's when you do the post-emergency care yourself).
IMO if you're not willing, or can't afford, to spend more than a small amount of money on buying a horse, maybe you shouldn't buy one. Not what your friend wants to hear I'm sure, but the harsh reality. Proper care of a horse costs a lot of money.