For $100 you should be able to find something better. The Tektronix 5000 series were intended for the physical sciences and not electronics; as singapol points out, the 5103N only has a 2 MHz bandwidth.
The 5103N does not require the middle plug-in which is the second vertical plug-in to operate. These oscilloscopes are fully documented and it is likely repairable but it is not something I would recommend for a beginner unless they already own it.