Stong sales guys are smart, and commission only doesn't scare them if there is a solid plan and opportunity.
You have to put together a strong sales presentation for the job yourself.
You have leads- good. Be able to show where they are in the pipeline. Hone in on sales process KPIs. Show hard data on the length of the cycle, typical number of calls to get in, present, and get it closed.
Determine the commission structure and be able to show what a data-based earnings figure would be for the first 90 days, and then your realistic expectation for the next quarter.
Give examples of the sales collateral and ideal presentation style for the industry/your company, since good sales people along know what they're good at and not. Though ideal candidates in this situation may show potential for disruption and doing it better.
You need to also have a projection of what you expect the earning potential to be within two years. Depending on your area, it should be close to, if not in the 6 figures for the first year, and then well into six figures going forward.
However, don't tell them that. After you show them the process, and the first two quarter projections, you need to ask them what they would expect to make in the first year and second year. No matter what the answer, ask them to back it up.
Pessimists are out.
Delusional egomaniac are out.
Guys are who run numbers and are realistic are OK.
Guys who run numbers and are optimistic on the verge of psychosis are what you want.
Bottom line, sell them on the company and working for you, personally. Then sell them on the opportunity they have. Then make them sell you on why to hire them.