FWIW, there is no guarantee that a "spawning pair" will breed for you in your tank. When you move a pair they will almost always take a break. Sometimes that break only lasts a month, sometimes years, sometimes they never start again.
If you buy a large ocellaris and a small one and give them the proper conditions, they will likely be breeding within the year and the cost will be around $20 vs. $100 or more for a spawning pair.
Just a thought.