Construction machinery and construction equipment are used in the construction industry. Construction machinery includes: rollers, road marking machines, frontal, track and mini loaders, mine and tunnel equipment, excavators, dump trucks, bulldozers, concrete mixers, concrete pumps, concrete pavers, drilling and crushing plants, asphalt pavers, road sprayers, port and special tractors, and etc. Technical progress in machine building introduces changes in the custom vehicle market. Today, along with selling/buying excavator, bulldozer ads, selling/ buying electric excavator or diesel-electric bulldozer ads are often placed. Custom vehicles by fifty largest producers are offered at the Port of Machinery trading site, such as Komatsu, Caterpillar, Volvo, Liebherr, Hitachi, XCMG, Sany Heavy Industries, Terex etc.