I always think about any major purchase in terms of value. Take the amount you paid for it and figure out the return you will get from it. The first sewing machine i purchased with my own money was roughly $100. I then purchased about $50 in fabric and made curtain and window coverings for my entire home. After that first project my sewing machine was "paid" for in savings. What it would have cost me to buy manufactured curtains was probably double what i invested.
I even considered the same thing before i bought a table saw that rarely gets used. But, after the first project it paid for itself with the savings.
What you are going to make with that machine will more than pay for itself in time. Maybe not after your first project but it wont take long. Then it doesn't matter what you paid for it as long as you are happy in the end.