I have for sale the following Tektronix Oscilloscopes Tektronix 2336 2 channel 100 Mhz Oscilloscope with Tektronix service manual. Works very well. $200.00 Tektronix 453 2 channel 50 Mhz Oscilloscope with Tektronix service manual. Works very well $110.00 Email or call 240-298-1316 if interested Gene Talley joseph.talley2 at verizon.netN3NO