Yes, of course. The question, however, is how to buy a vehicle appropriate for your needs, compliant with industry regulations and standards, and one with which you will be satisfied in regards to functionality, future service and warranty. Be aware that some states, of which California is one, have specific laws concerning selling a vehicle across state lines. Unless a wheelchair van conversion company is specifically licensed through the California Air Resources Board for that specific make and year of wheelchair van, purchasing a non-CARB vehicle can result in significant fines for the conversion company and potential loss of the use of the vehicle for the consumer.

Understand that you may never meet your representative personally nor see and ride in or drive the wheelchair van you are purchasing. Internet sales companies usually do not have regional sales representatives. You will be assigned an "in house" sales representative, who will assist you, but with the lack of personal interaction, they may not be able to fully assess your needs, and the opportunity to develop a personal relationship will be diminished.

Also, if your wheelchair van has serious problems, either structurally or mechanically, you may be stuck. While most states have "lemon law" statutes that address defective vehicles, your state's lemon law may not apply if the van was not purchased in that state. In many situations where there is a conflict, personal contact and established relationships help resolve the problem. In the case of on-line purchasing, you may never personally meet an individual from the internet seller. Be aware, as well, that even if there is a mobility dealer close to you, they may be unwilling to service a vehicle purchased from an on-line source.
 
The biggest consideration, however, is whether or not the wheelchair van you are purchasing is appropriate for your individual needs. You really will not know until the vehicle is delivered to you. Every van is different and mistakes can occur. Also, without the internet seller meeting you personally and you having the ability to "test" the vehicle, there is no way to fully ensure that you will properly fit in the wheelchair van and be able to use it as you desire. Make sure in advance that you have the right to refuse delivery of the vehicle and receive a full refund if, upon delivery, you do not like the way the van fits your needs; it fails to meet your reasonable expectations; or, it does not match the description provided by the internet seller.