The usual way to look at a price is a combination of its your original cost plus a certain amount of markup . The cost includes what you paid along with any shipping, handling or export fees. The markup goes toward your operating expenses and what remains becomes profit. Each fits different types of business, though some mix them depending on the product. Discount pricing involves constantly trying to meet or beat the competition.
Goods sell at a similar price in various places until someone drops the price again further.
In this race, one must try to sell more goods a lower price to make more money. Often this means trying to deal with wholesalers, vendors and distributors to keep costs down. Negotiated pricing is most famously seen in the stickers on new cars. The dealer sets a price and then haggles with the customer to get a mutually agreeable price. Negotiating is typically done with big-ticket items where there is plenty of room for markup, such as antiques, furniture jewelry, electronics or real estate.