It's up to you, but remember to read their Acceptable Use Policy. BTW, those prices from MCHost and HostNexus are actually the real costs of reseller plans.
Here's another one (and yes, these are actual, reasonable prices, contrary to what you may think): http://www.ecommercediscovery.com/hosting/reseller.html
Here's another one (and yes, these are actual, reasonable prices, contrary to what you may think): http://www.ecommercediscovery.com/hosting/reseller.html