Rhapis excelsa, aka Lady Palm
The standard form of this relatively low light palm grows to 6-9 foot height. The standard version is commonly used in malls and other indoor plant displays.
This dwarf population is nicely variegated. Currently in 6" pots, with an overall height in 8" to 16" range. Prices from $60 to $90 each, depending upon the number of growths in the pot.