Unfortunately, I think the consensus will be you should sell them both. Very few people are happy about the loot boxes and certainly wont recommend you pay turbine points for any keys. As a player of 4 years now, I got the anniv gift boxes with 3 bound keys for each toon. I will use those up on boxes i get from kills, but i wont open any others after that till Turbine assures us the contents have been improved/scaled to our levels. Stuff I got was nothing to get too excited about.
It sounds like you could use the money and TPs so probably best not to be tempted and go ahead and sell. Since the keys found on any mob can be used on any level loot-box, those will be worth much more (5-6 gold depending on server) so unload those for the people openning lvl 70+ boxes. They are rich anyway.
Good luck getting the goat!
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