Well, that's especially true when it comes to buying pipes on eBay, Amazon, and other sites like that. 999,999 times out of a million, $150 will not buy a good set of pipes. It's true, something will arrive on your doorstep, but it won't sound good. (Sidenote - if you have a cat infestation, $150 sets could be the perfect tool to scare them away).
Many of these "cheapo" sets come from Pakistan and India, and they are not made with tonal production in mind. In fact, you'll be lucky to find a set that even plays at the pitch you need it to.
The bottom line is, when you purchase your first bagpipes, you'll be spending $1000-$2000, depending on the frills and add-ons you select. To get the quality of wood and craftsmanship you need to really produce a good sound, you should expect to pay this much. Remember - that's why you've worked so hard on your fingerwork fundamentals - so you could hear it come to life on a great sounding instrument!