I am the new owner of a 94 accord lx coupe, and I don't have an ABS light on my dashboard, so I assumed I don't have ABS. However at the shop I got quoted for a master cylinder job, and they looked under and told me that my car has ABS sensors. Is there another way I can check myself to make sure whether or not I have ABS?

follow the brake lines from your master cylander, if they go to a big box and not directly to the wheels, then you have ABS. There should be a sticker under the hood stating that the car has ABS as well....

Do you see a unit like this in the engine compartment? That's the ABS modulator. Look for the fluid reservoir (#3) on top of the unit.
http://www.hondaautomotiveparts.com/auto/jsp/mws/catimgs/13sv20_j07.gif
The LX coupe was available with or without ABS that year.

look under the hood for any ORANGE connectors ,,,,,,,,,,,,ABS is the only system that uses ORANGE connectors

and by the way the price for the brake mater ishould be the same wether you got ABS or not ,, and when replacing master cylinderr there is no need to do anything with the ABS system ..
the pic that JIM showed ,, if car has ABS it is located next to the p's reservoir , driver side inner fender under the hood ,