A highly regarded company goes on sale on the New York Stock Exchange this week, but after Wall Street takes its cut, you may not have an opportunity to buy shares at much of a discount.Wendy's ( WEN) is set to spin off 15% of Tim Hortons, its Canadian doughnut chain named after a former NHL star. The shares are expected to price Thursday night and trade Friday under the ticker THI. Given all the excitement about the IPO, they could quickly get expensive. "Tim Hortons is a fantastic asset and there's going to be an unbelievable amount of demand for the stock," says Shawn Kravetz, an analyst with Esplanade Capital. "You look at Chipotle ( CMG), which doesn't have nearly the quality of a Tim Hortons, and yet that stock went absolutely nuts after its IPO." Chipotle Mexican Grill debuted in January after being spun off by McDonald's ( MCD). The shares doubled in one day to close at $44, marking the biggest opening-day gain for a U.S. IPO since late 2000, according to Thomson Financial. Now investors are salivating about the next big IPO in the restaurant business. Late Monday, Tim Hortons raised the share price of its proposed offering of up to 29 million shares to $22 to $24 from the previous range of $18 to $20, based on the anticipated demand in the market. Banks managing the IPO, including Goldman Sachs ( GS) and JPMorgan Chase ( JPM), may sell another 4.35 million shares to meet that demand. In all, the company could raise as much as $800 million. In this atmosphere, investors trying to get their hands on shares of Tim Hortons early in the process, when new offerings are often priced below their intrinsic value, might be forced to eat big trading commissions with Wall Street brokerages that often are accused of favoring their most well-heeled customers in IPOs. Those investors not fortunate enough to be in the proverbial club may do best by buying shares of Wendy's now, because the fast-food giant will still own 85% of Tim Hortons when all is said and done. Wendy's says it doesn't plan to spin off the doughnut chain in its entirety until later this year.