HP ,Hewlett Packard, HP sells over-priced, not needed equipment. Cupertino, California

I bought a HP computer in 3/09 but my existing HP printer would not work. HP told me I needed a compatible HP printer, sold it to me over the phone.  A couple months ago I bought triple volume ink cart for 2X retail - seemed a good deal - but it ran out of ink in short period. I don't print a lot. HP tech help said the heads were bad and I needed an "upgrade" of my printer for $134.  I ordered it, received it on 12/10/10. Instruction said the disc would start automatically to install the unit.  It didn't. I called their tech support but it was me who found a way to start the installation.  Today I discovered the same printer for sale at Wal-mart fr $74.oo!  I called HP about the descrepency and their response, in essence, was "Gee.  That's too bad.  You bought, you got it."  I will NEVER buy HP products again. I question now if there was ever anything wrong with my printer originally.