The Ibanez TS10 Tube Screamer Classic is a renowned overdrive pedal, part of Ibanez’s esteemed Tube Screamer lineup. Introduced in 1986 as part of the “Power Series,” the TS10 gained popularity for its ability to produce a warm, natural overdrive that enhances a guitarist’s tone without overshadowing their technique. 
Notably, legendary guitarists such as Stevie Ray Vaughan and John Mayer have utilized the TS10, contributing to its iconic status.  This association has significantly increased the pedal’s desirability among musicians seeking to emulate their tones.
In recent years, the TS10 has become highly sought after, leading to a substantial rise in its market value. Prices for used units have been observed ranging from $200 to over $1,600, depending on factors like condition and specific components, such as the presence of the JRC4558D chip. 
For a comprehensive understanding of the TS10’s capabilities and to hear it in action, you might find this video insightful: