I think it should be about £800 for that lot these days, but we had something similar needing doing last year, and were quoted £1500. We went with it even though it was a lot, and when they got here (2 men) they said more work needed doing than they first thought, as they needed to wash all the walls down, and it would need 3 coats of paint - so more labour and more paint! And it would be an extra £300 for the 'materials.'
Ended up being £3000 instead of the original £1500. To paint a 17' X 14' lounge-diner, a small to medium sized kitchen (that's half wall units, 2 doors, and a big window,) a small hallway, (6' x 6,') and a small bedroom, (8' x 10'.) They only needed painting - not wallpapering.
At this point, we cancelled them, paid them for the paint they had already bought, and the day's labour, and sent them on their way. Cost £425, but was better than spending £3000. We did it ourselves in the end. Took a month, but looks amazing now. Already had all the paint which would have cost about £125, so we were £300 down, but it was worth it to save the higher amount of money they wanted. £3000!
Whilst chatting about this to someone, it emerged that these 2 men had done this to people before. Some had sent them on their way, some had paid up/been ripped off.
What did you pay @JustAnotherDilemma ?