Hi
This product 710 is obsolete about 2 years back.
The new product is 840c which is also on its way out the new product will be 845c. You could also go in for the hp 948 c which will cost about 9500/= and is a much superior printer as compared to 840 c.
The 710 c was a very good model and I have an old piece in my residence and it never gives me any problem at all.
The cartridge usage is also very good and I have printed a good amount of black and color and the cartridge is still in use.
bye
sampath