I think we have hardwood on our floors..

It is probably cheaper to do it yourself and it is very easy. a lot of work but easier then you think,. YOu just hire the floor sander then you polish it. there is more to it. you have to bang all the nails down before sanding then putty up any gaps.. Then sand.. Then polish. you can use any colour polish. We went semi dark and it came up a treat. It is 10 yrs old now and while it really needs re doing (still looks fine when clean though) We aren't doing anything till we renovate our house