There are 2 kinds of visa you can get upon arrival in Egypt, Sharm-el-Sheikh.
First kind is a free zone of Gulf of Aqaba and Saint Catherine visa, so called Sinai only stamp, you get in Sharm el Sheikh airport upon arrival.It is a stamp you get when passing passport control and it is free of charge. This visa covers the following areas of Sinai: Sharm-el-Sheikh, Dahab, Nuweiba, Taba and St. Catherine.
Second kind is a full visa of Egypt, you can buy in Sharm-el-Sheikh airport upon arrival as well in case you do not need to obtain Egyptian visa prior to your visit to Egypt. Full visa of Egypt costs 25$ per person. It is a special sticker you put in your passport and pass passport control with it.