Yes, the ideal scenario is to purchase them at a discount.
While it is not trivial to do so, it is not that difficult either.
Patiently monitoring NSE/BSE
either manually or using API-automation or terminal software
provides crores of sovereign bonds at discount to their face-value.
Also, here are some of the common opportunities with bonds, that pop-up all the time…
For more details along these lines, checkout this recent discussion-thread.