Here are a few sites to visit to get rid of them http://www.diatect.com
And of course you can always call Orkin http://www.OrkinCommercial.com
If you are wondering how you can find out in advance of purchasing, the answer is simple. Have a pest inspection done as part of your home inspection contingency. This is quite common and may cost a few hundred more to have this done by a pest expert, but it's worth it if this is something that is of major concern to you. It's important to note that the inspector can only access the unit you are looking at and the common areas of the building. They will not be able to inspect other individual units.
If a problem is found by the pest inspector, you can use this as a negotiating point in the sale. You may be able to walk away if your offer is written properly, or you can ask the seller pay for the extermination.
Feel free to contact me for more information on how offers and inspection contingencies work.
However, if the unit does have bedbugs, the seller would be legally responsible to inform you of that fact.
I would suggest that you ask the seller to prepare a "seller's description of property" document which they sign and you sign. If you are fearful of bedbugs, ask them to add an addendum regarding bedbugs to that report. Then, if it turned out there WERE bedbugs, you could come back to the sellers and demand compensation.
Meanwhile, I would contact an exterminator and ask him/her how to eradicate bedbugs from an empty home. It might not be an expensive proposition, and if it gives you peace of mind, then do it regardless of what the seller reports.
Anyway, talk to NEIGHBORS.
The health department didn't discover our problem, the people in the waiting rooms of hospitals figured it out.
Inspect antiques and secondhand furniture thoroughly before bringing them into your home.
Change linens at least once a week, and wash in hot water of at least 115 F.
Vacuum around the home at least once a week, paying special attention to areas surrounding bed and furniture posts.
Caulk holes in the floor and walls.
Discard any old furniture, including bed frames and mattresses. Use sprays, such as dichlorvos, permethrin and malathion, around cracks and crevices in your home.