$5 dollar petco fish VS $120 dollar fish from online!

Hello everyone! I recently ordered some fish online and bought a fish from Petco to compare the quality of the two. The fish I bought from Petco was 5 dollars while the koi angelfish I bought were around 120 dollars with shipping. I had ordered the fish from Angelsplus.com and I am very pleased with my koi angels! Check em out!