Aliexpress is absolutely the wrong place to be looking!
You haven't got your country flag set so it's only possible to give limited suggestions. You also haven't said what context you are doing this testing in. There are legal implications in many countries.
Multtifunction testers (MFTs) -the resistance, insulation, RCD etc tester that you are takling about, are available from several manufacturers of professional equipment, again depending on location. In the UK for instance it would be Martindale, Kewtech, AVO, Fluke plus probably a few others.
As electricians move over to MFTs, they often sell off their single function testers on ebay, for instance an Insulation (high voltage) and Continuity (=low resistance higher current) tester, RCD tester, Loop impedance tester etc for little money. They will be out of cal, so can't be used for installation certification but can still be useful and verifiable. For example, it is easy to check the accuracy of an Insulation and Continuity tester with a few low and high value resistors and a DMM [Edit: others are more difficult].
You really need to give more detail of where you are and what you are trying to do.