This TDS784D  is in good  condition and has options 13, 1F, HD, 2F, 2M, 2C, 3C and 4C installed according to splash screen. It does not come with the P6701B or P6703B probes included. They are available for an additional fee. It passes all self testing, self calibration, and functional checks. This unit is missing the label that is normally on the front bezel of the scope. Also the front bezel has a repaired crack as can be seen in the last photo. The rear bezel has 2 hairline cracks that have been repaired with superglue. All the cracks in the bezels have been thoroughly repaired. The CRT has some slight burn marks. 

Some options are defined here: 

Tektronix DPO Oscilloscope per TDS operator manual

Model TDS784D

Includes the following options:

13 - RS232/Centronics Hardcopy Interfaces

1F - Floppy Disc Drive

HD - Internal Hard Disc Drive

2M - Add'l 2M/Channel Memory Length

2F - Extended Waveform Math

2C - Communications Signal Analyzer

3C - P6701B with system calibration

Oscilloscope comes with a P6701B and calibrated short-wavelength optical reference

receiver on channel 1. (Option applies to TDS 500D & TDS 700D only, except TDS 794D.)

4C - Fibre Channel Optical Reference

P6703B with system calibration ,Oscilloscope comes with a P6703B and calibrated long-wavelength optical reference

receiver on channel 1. (Option applies to TDS 500D & TDS 700D only, except TDS 794D.)

1 GHz Bandwidth, 4 Channels

• Sample Rates to 4 GS/s
• Record Lengths to 8 M Points
• Up to 200,000 Waveforms per Second
• 8-Bit Vertical Resolution, >11 Bits with Averaging and >13 Bits with Hi-res
• 1 ns Peak Detect
• Floppy Disk Storage
• Iomega Zip and Zip Plus Drive Compatible
• Advanced Triggering
• 29 Automatic Measurements and Measurement Statistics
• FFT, Advanced Math, Histograms, Limit Test
• FastFrame Time Stamp
• Communication Signal Analysis, Including Mask Testing and SONET/SDH and Fibre Channel Optical Reference Receivers
• GPIB