On the military:
Not sure about active duty, but I know Nat'l Guard is handing out $20,000 sign on bonus (depending on MOS) and then the pay for the weekends you work. Pretty good money overall, for the work that is done.
I work in the Automotive industry.
Salesmen are paid on commission per vehicle sold. Just say you get $200/car (close to average) you sell 10 cars a month, you get $2000 pre tax. There are spiffs and such that some dealerships will run, as well as the different manufacturers will reward high salesmen too with different promo's.
There is a "base" salary, but it's more of a minium than a salary. The base where I work is $1,200/month. So (using a $200 average again) if you sell 4 cars, you get $1,200, if you sell 6 cars, you get $1,200, if you sell 8 cars, you get $1,600.
I have a couple friends that work at the local Zuke/Kawi dealership, and the pay is simialar. They make between $150-$400 per rig sold. Differs between bikes/atv's/jet ski's/etc. I would assume there is a minimum there too, but not sure what it is.
If you do go with sales, especially Recreational sales, be sure to get with a place that sells bikes and atv's and sleds and jetski's. I've seen too many places that have just summer toys lay a LOT of sales men off in off season, or if they are not getting laid off, they aren't making much money.
Depending on what you are looking at making, the auto or the rec sales field, you can probalby figure on making around 30K a year, if you can sell.
Sorry for the novel.