How much will it cost to move? from houston to Austin?

Reliable would be the problem. $300.00 will barely cover most moving companies expenses. You'll need to check with shipping companies rather than moving companies and the cheapest would be the post office but that will run you more than $300.00. Next best thing is to call the moving companies and see if anyone can work a deal based on a partially full truck. Something fuzzy about that website there. The tiny URL rather than the full may be efficient, but not always trustworthy. Add to that the fact that all three of the previous answerers were added yesterday, looks like a trap.