The DGX505 is over $500.00. For $429.00 you can buy the DGX305 which is the same keyboard but with 76 keys instead of 88 and no bench and stand. With a bench and stand it can be bought from my store for $479.00 and you get a 2 year warranty, headphones, CD full of software, pedal all of which Costco doesn't offer, or you can buy the DGX505 for $599.00, free bench, headphones, 2 year warranty, free software and included stand as shown in the picture at the link DNJ posted.
The other keyboard I recommend is the Casio WK3500 which sells for $399.99.


------------------
George Kaye
Kaye's Music Scene
Reseda, California