Office Depot has a nice but small selection of "fill your own" inkjet refill kits.
The HP's are $19.83~ for the Color CR1823, which looks identical to many other 700/800/900 series cartridges, I bet they'd work on most of the 3-Color carts.
The black was similar in price.
also had some Epson and Canon refills in my store.
All 900 series HP users take note that the #78 High Capacity carts are $54.00 ea ,, use the coupon and it makes the pill easier to swallow.
Please note the suffix on the carts indicate High Capacity or normal.
No# 78 Color, p/n C6578DN is the normal cart, sells for about $37.00
Ink volume: 19 ml
No# 78 Color, p/n C6578AN is the hi-capacity, sells for about $57.00
Ink volume: 38 ml
The #15 black that fits these is also packaged in twin packs, saving several bucks.
#no. 15 p/n C6653AN is the twin pack, costs about $54.0.
50 ml [25 ml per cartridge]
http://www.shopping.hp.com/cgi-bin/h...er&cat_level=1