I think where overselling gets a bad image are from those companies that come out and offer the "Unlimited" bandwidth and disk space packages. However, I know that while building up my client-base I need to keep overhead down by either using a reseller account or a VPS. I will get something larger when I have enough clients to justify moving (ensuring that I do not get too close to my resource limit). Did some of you larger companies start out by overselling your allowed resources? Or did you jump straight into a dedicated server and just tried to market well to quickly build up clients and bit the bullet on your overhead?