For wallpaper, to me, SGD $100 - $130 is the average price for a good wallpaper in a 10m x 52cm standard roll. Goodrich is ridiculously expensive! Yes, they are reputable/reliable and a major player in the wallpaper market but I am not sure if I will use them. I haven't seen ALL of their samples though I have the general impression that most of it is really nice from a quick browsing. Goodrich average price is $300+ per roll. One roll will cover approx 2m x 2.5m. Cheapest quote to do a 3.5m x 2.5m wall is $500 with installation.
My room only needs wallpaper on one side and is mostly air-conditioned with not much direct sun, so it's okay even if my wallpaper is not the best vinyl type. Reasonable quality will suffice. If you guys want to buy wallpaper direct from retail and find your own installer, I think
http://www.tangletree-interiors.co.uk/wallpaper/ has some of the widest choices. I don't work for them, I just happen to chance upon their site and I think it's awesome! The range is STAGGERING, really nice brands and prices are attractive. They're a UK website and they ship globally. I'm definitely buying a couple of rolls.
If anyone has lobang for freelance wallpaper installer, kindly share! If I manage to find one, will post here again.