Nour,
In your original post you mention a limit of 1,000 USD.
Considering this price limit, we’re talking about a professional 6 1/2 digit bench meter, from a reputable Test & Measurement manufacturer.
BK Precision 5492B is not playing on this league.
Neither is Keithley 2100 - As already mentioned, this is a rebranded Picotest meter and cannot be compared with “real” Keithley products, both in quality and performance.
As you mention you want to buy a new meter, I would strongly suggest you consider Keysight 34461A; This a professional precision instrument that will surely serve you well for many years.
Unless you start doing some serious very high precision work, the 34461A is all you need.
However, If you ever need a better meter, there are some options available such as:
-Keysight 34470A
-Keithley DMM7510
-The venerable Keysight 3458A
Of course, these meters cost a lot more...