I'm thinking of getting a monochrome laser printer.  I'd like to be able to scan  and copy with it too.  Because my main purpose for it will to be print envelopes I don't intend to buy what would be called  a high end printer. 
On occasion I will have to print out price tags.
I need one that the cartridges will last a long time and replacement cartridges don't cost as much as the printer.

I've had HP, Canon, Epson and Brother printers over the years.  My current Brother is perhaps the best of the lot.  

I will be using it wireless too.