It certainly pays to shop around. I find if you hit the box stores, and even the Walmart on delivery day, you can find some really good deals. I live close to Apopka growers and know for a fact they deliver the same plants to all the local garden centers/nurseries, including the box stores around here. I know because I've seen the same truck on the same day, same guy stocking the plants when I'm doing my browsing....
This variegated hoya was at Lowe's for $12. something, the same day the same plants just slightly larger were at a local nursery for $59.
This Monstera was $6.98 at Walmart