Just read this thread and what a great read. Reminds me of my early days buying from
ebay. All the hard lessons, disbelief, anger, wanting justification, and even the, 'I can make a difference.' I can have them shut down!
Glad I listened to the advice here, studied the grading forum here, searched here for the bad
ebay sellers list, learned how to photograph coins here to share and ask questions. It takes years!
Once you do your research, find your preferred sellers, notice juiced photos (or even photos that may be inadvertently hiding things), and take your time with quality photos and a rock solid return relationship with reputable dealers, things get easier.
If you can't be sure you know from the photo what you are getting, flaws and all (and there should be some on every coin), then just be patient. Move on to the next opportunity. There are more ways to lose money with coin collection than make it, by a factor of 10x (or more)!!!!