You'll likely need to go the purchase order route. My software is priced around $2.5K and it seems to be the transition zone between credit card & purchase order (at least from my experience).
One interesting thing you'll notice is Amex is much preferred at higher credit card levels (e.g. $3K vs. $1K). If you plan on pricing your product above $1K and want to use credit cards, make sure you support AMEX.
One interesting thing you'll notice is Amex is much preferred at higher credit card levels (e.g. $3K vs. $1K). If you plan on pricing your product above $1K and want to use credit cards, make sure you support AMEX.