GRAYSON COUNTY, TX -- Some people think December 21st of this year will be the end of the world. The end of one Mayan calendar and other prophecies have led some to believe an apocalypse is near and people are stocking up to survive.

The Mayans created more than just one calendar. It is what we call the Long Count Calendar, which begins with Maya creation and "apparently" ends just three days before Christmas Eve; however, it is not just the calendar's end date that has Preppers worried.

"It can be nuclear, biological or chemical warfare. There could be civil unrest. What about a dirty bomb," asked "Sally" a Prepper.

Man made and natural disasters can happen at any time. That is why Texoma Prepper, who we will call "Sally" to protect her identity, says she is stocking up on survival tools.

"It's important that people start opening their eyes, waking up and getting prepared," "Sally" said.

Sally says she has been prepping for more than 12 years. One of the scenarios she is ready for is economic collapse.

"What was 9/11, but an attack on our financial system to collapse America," "Sally" asked.

Although Sally does not worry about the long count Mayan calendar ending on December 21st. some Preppers do. but Austin College Professor Don Salisbury says that should not be a concern.

"It actually doesn't end in December, and that's actually some what a misinterpretation," Salisbury said.

Salisbury says December 21, 2012 will mark the end of 12 and the beginning of 13 ba'k'tuns (one ba'k'tun = 20x20x18x20 days, about 394.25 years) on the Maya Long Count Calendar -- roughly 5,125 years, which some people believe means a new era in Maya culture.

"One must understand these so called predictions in context, and realize that it's quite problematical to try to extrapolate those predictions from those times abruptly 600 AD to our own modern time," Salisbury said.

"Sally" says regardless of what people believe you need tools to survive any possible situation.

"Do you have a gas mask? Do you have a shelter a place to go where you can protect yourself? Do you have weapons do you have ammunition," "Sally" asked.

Sally says she is loaded up on guns and ammunition, and it is Preppers like sally who are aiming to buy weapons before they are gone.

"We got 25 AR-15s in today and we've already sold 14 of them," Michael Vansant said.

Michael Vansant and Garrett Patton, owners of American Armament Company, say after the presidential election guns and ammo have been hard to get from suppliers.

"Tuesday they had 70,000 Mags in stock and now today they got zero," Vansant said.

Patton says gun sales are booming because some people fear President Obama will ban certain guns and limit ammo.

"I think that if we didn't have the old assault weapons ban people wouldn't freak out quite as bad. You know the assault weapons ban scared a lot of people," Patton said.

While guns may be an expensive survival tool to buy "Sally" says there are other alternatives.

"Even if you just put five dollars a month aside and start buying some canned good some dried foods," "Sally" said.

"I think it's foolish not to prepare," "Sally" exclaimed.

Sally tells us she and other Preppers do not want to be identified in order to protect themselves and their families. She says if disaster strikes those who have not prepared would know who has and might try to steal their supplies.