They haven't made the 2-cycle mowers for at least two years now. If you have seen a Duraforce model for sale new, and it is at MSRP, then you should buy it. If you try it and don't like it, you can sell it for more than you paid as a slightly used model. And yes, I'm being serious.

If mixing oil/fuel together is not a "hassle" for you, like it seems to be for some, then yes, but a 2 cycle LB. There are many many models still around today. Call every local small engine shop in your area, and tell them what you're looking for. All kind of depends on what you're willing to pay. All of my Lawn Boys I've bought used ranging from $25 to $125, some worth much more. Check newspapers and yardsales. LB's seem to creep up out of no where like in barns, basements, sheds etc. I'd recommend any model from 1976' on through the mid 90's, aluminum deck, with the F-SERIES engine. Overall great performers that last long with basic maintenance and care. If you find specific models you're interested in, post them here for more advice from many who comb the posts here daily. Good luck!

Thanks everyone. Going looking at a couple today.

A 2-cycle Lawn Boy is what I use to mow with, I've had mine for 8 or 9 years now. I have lots of old mowers, some work, some don't, but I do prefer the LB. I don't mind mixing gas and oil, it so easy to do and I don't have to ever change the oil. There is a big following for the LB 2-cycles, you can sell them.
I've picked up a couple at the dump over the last couple of months and they are quite nice.
Keep Stabil in the gas, keep fairly fresh gas, don't let it get old. Don't be afraid to change the spark-plug every year or sooner. They can be persnickity to start, but fresh fuel and stabilizer help this immensely.
good luck, and welcome to the Lawn Boy club.

Two-cycle Lawn-Boy mowers will in my opinion be the Holy Grail of walk behind mowers in the future. I have been stocking up on LB's and their parts for the last couple of years. I have concentrated on the Dura-force and the F series engined mowers. I like the self-propelled units best, 9 out of 10 are SP. The most important thing beside the overall condition of the mower is the amount of compression the engine has and that there is not too much side play in the crankshaft, you can check by disconecting the plug wire (very important) then reaching under the mower and feeling the side movement in the crankshaft. Check the compression by pulling the starter rope and feeling it's resistance. Good luck!